KKmoon Car Van Battery Terminal and Wiper Arm Puller 6-28mm Repair Tool Top quality, designed for professional use. A perfect tool to remove the stuck on wiper arm. Tighten knurled cone to force jaws under the cable clamp. Turn center screw to lift clamp off terminal. Also removes bolted-on windshield wiper arms that fit over a tapered spline. The puller screw pad is designed to fit the top of the spline post for easy pulling.